The great info passed on to my by this very site goes like this. First support the differential with a jack.You have to remove the 2 front differential mount bolts, the 2 large differential mount nuts at the rear. Push the differential foward a few inches. Unbolt the moustache bar and it should drop right out. The hardest part for me was reinstallation, keeping the one side of the bar up while bolting it back in place, its just kinda awkward and a little easier with two people.
BTW Before you do this think of how you are going to get the old rubber out. i put the bar on the stove and burnt the rubber out. Do you know how hard it is to clean up burnt rubber????? Good luck